automatic continuity;
operators commuting with translations;
translation-invariant functionals;
uniqueness of norm;
maximally almost periodic groups;
amenable groups;
D O I:
10.4064/sm173-3-3
中图分类号:
O1 [数学];
学科分类号:
0701 ;
070101 ;
摘要:
Let tau(X) and tau(Y) be representations of a topological group G on Banach spaces X and Y, respectively. We investigate the continuity of the linear operators Phi: X -> Y with the property that Phi o tau(X)(t) = tau(Y)(t) o Phi for each t is an element of G in terms of the invariant vectors in Y and the automatic continuity of the invariant linear functionals on X.